"A sacrifice to be real must cost, must hurt, and must empty ourselves. Give yourself fully to God. He will use you to accomplish great things on the condition that you believe much more in His love than in your weakness. Mother Teresa of Calcutta
The love is the thing that's going to make an impact; giving is nice and it will help those who you give to, but that love is going to be what plants seeds in other peoples' hearts to share what they have with even more of the population, and so on, and so on.